There are two really annoying bugs in this phone:
NFC can be turned on without asking for a password/unlocking if the NFC is in the shortcut tiles when you slide down from the top bar.
There should be an option in the settings to not allow NFC to be turned on, as I already saw this in many other phones and this is available in the android system.
When using 2 sim cards, if i disable one of them and then restart the phone, both sims are active again after the phone turns on again.
The settings should save and the sim cards should stay as you left them before restarting and not reactivate both if you left one of them off.
Can you please fix this in the next android updates? Thanks.